Method for decoding a video source picture from the method and the sub-band information for hierarchical coding of a video source image

摘要

The method comprising a step of spatial analysis based wavelets (3) comprising the filtering operations of the image to the format of higher resolution and of the operations of decimation in the horizontal and / or vertical of the filtered image (8, 9, 12, 13, 14, 15) for delivering signals under - band (16, 17, 18, 19) is characterized in that a decimation operation is carried out according to a factor of a different value pair and corresponds to the quotient of the horizontal or vertical dimensions of the first and second format so that the image of the low frequency thus obtained (19) relative to the signals of under - low frequency band, corresponds to the second format.